---
product_id: 447488187
title: "Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI, Nitrile Diaphragm, QBY4-25L-1inch-35"
brand: "happybuy"
price: "$1351"
currency: NZD
in_stock: true
reviews_count: 5
category: "Happybuy"
url: https://www.desertcart.nz/products/447488187-happybuy-air-operated-double-diaphragm-pump-1-inch-inlet-outlet
store_origin: NZ
region: New Zealand
---

# Aluminum alloy corrosion-proof housing 35 GPM max flow rate 120 PSI max pressure Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI, Nitrile Diaphragm, QBY4-25L-1inch-35

**Brand:** happybuy
**Price:** $1351
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your fluid handling game with industrial-grade power and precision!

## Quick Answers

- **What is this?** Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI, Nitrile Diaphragm, QBY4-25L-1inch-35 by happybuy
- **How much does it cost?** $1351 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/447488187-happybuy-air-operated-double-diaphragm-pump-1-inch-inlet-outlet)

## Best For

- happybuy enthusiasts

## Why This Product

- Trusted happybuy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Powerful 35 GPM Flow:** Keep your operations running at peak speed with a robust 35 gallons per minute capacity.
- • **High-Pressure Performance:** Handles up to 120 PSI to tackle demanding fluid transfer tasks effortlessly.
- • **Advanced Nitrile Diaphragms:** Premium double nitrile diaphragms ensure chemical resistance and extended pump life.
- • **Smooth & Efficient Air Valve:** Low pulsation stainless steel air valve minimizes downtime and maximizes operational efficiency.
- • **Built to Last with Aluminum Alloy:** Experience unmatched durability and corrosion resistance for long-term industrial use.

## Overview

The Happybuy Air-Operated Double Diaphragm Pump features a 1-inch inlet/outlet, durable aluminum alloy housing, and premium nitrile diaphragms. It delivers up to 35 GPM flow rate and 120 PSI pressure, designed for corrosion resistance and smooth air-operated performance across diverse industrial applications.

## Description

Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI for Chemical Industrial Use, QBY4-25L-1inch-35

Review: Worked very well.
Review: Worked for water barely and then when I tried oil it didn’t work at all. Went out and spent 2k on a wilden pump and have had not a single problem. Kept getting air locked. Waisted time and money on this piece of crap. Go buy name brand and save yourself the headache.

## Features

- Premium Double Nitrile Diaphragms: Our air-operated double diaphragm pump adopts nitrile diaphragms, durable, corrosion-proof, and long-lasting. Max. Temperature: 150 ℉/66 ℃; Max. Pressure: 120 psi; Max. Flow Rate: 39.6 GPM; Max Head Lift：275.6 ft/84 m.
- Sturdy & Leak-proof Construction: The diaphragm pump housing is made of aluminum alloy material, bolted against leakage, sturdy, and corrosion-proof for long-time use.
- Excellent Air-operated Performance: Inlet/Outlet Port Size: 1 inch; Air Inlet Size: FNPT 1/2 inch. A high-quality glyd ring, the double-acting sealing, strengthens air performance.
- Unique & Professional Designs: Our double diaphragm pump features an externally available air distribution system. The modular air valve is stainless. This low pulsation air valve provides smooth and rapid changeover for increased efficiency and minimizes downtime.
- Wide Applications: This diaphragm pump can handle various fluids, such as waste oil, alcohol, hydraulic fluid, gasoline, diesel, detergent, drink, and so on. It is widely used in many industries, such as petroleum, metallurgy, mining, coating, printing, water treatment, and automobile.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07KSYF7YB |
| ASIN  | B07KSYF7YB |
| Batteries Included? | No |
| Batteries Required? | No |
| Color | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (77) |
| Customer reviews | 4.4 4.4 out of 5 stars (77) |
| Date First Available | 22 June 2022 |
| Date First Available  | 22 June 2022 |
| Flow Rate | 35 Gallons Per Minute |
| Included components | 1 x Air-Operated Double Diaphragm Pump, 1 x User Manual |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 8.62 Kilograms |
| Item model number | QBY4-25L |
| Item model number  | QBY4-25L |
| Manufacturer | Happybuy |
| Manufacturer  | Happybuy |
| Material | Aluminum |
| Part number | diaphragm pump |
| Power source type | Air-Operated |
| Product Dimensions | 19.81 x 17.78 x 83.82 cm; 8.62 kg |
| Product Dimensions  | 19.81 x 17.78 x 83.82 cm; 8.62 kg |
| Size | 35GPM AL Alloy Nitrile Rubber |
| Style | Diaphragm |

## Product Details

- **Brand:** Happybuy
- **Colour:** Black
- **Material:** Aluminum
- **Product dimensions:** 19.8L x 17.8W x 83.8H centimeters
- **Style:** Diaphragm

## Images

![Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI, Nitrile Diaphragm, QBY4-25L-1inch-35 - Image 1](https://m.media-amazon.com/images/I/71I0xqMpiZL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Will this pump go on neutral when you close the valves?**
A: This pump is pneumatic. The material is pushed in one direct when the air valve is turned on.

**Q: Where woukd i find a rebuild  kit for this pump if i needed one? Any part numbers or kits?**
A: I am having the same problem no parts available as far as I can see I have been searching for hours and still no luck.

**Q: Do you have 3" or 4"**
A: 2”

**Q: rebuild kit for qpk15?**
A: Just because you put a question mark at the end of a statement doesn't make it a question. I recommend looking at previously answered questions. This is a cheap Chinese clone of an industrial pump. If you need rebuilt kits, buy a pump from a pump supply company.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by O***A on 23 April 2025*

Worked very well.

### ⭐ Review
*by A***N on 22 August 2022*

Worked for water barely and then when I tried oil it didn’t work at all. Went out and spent 2k on a wilden pump and have had not a single problem. Kept getting air locked. Waisted time and money on this piece of crap. Go buy name brand and save yourself the headache.

### ⭐⭐⭐⭐⭐ Review
*by F***V on 3 April 2024*

Pump ran fine for 6 months then failed, no product support or warranty. Sold by Amazon but Amazon says not supported.

## Frequently Bought Together

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-25*